Finding the Fourth Proportional to 255.61, 383.42 and 111.33

Step by Step Solution

1. Step 1: Write the proportion equation
   255.61 : 383.42 = 111.33 : x
2. Step 2: Convert to fraction form
   255.61/383.42 = 111.33/x
3. Step 3: Cross multiply
   255.61x = 383.42 × 111.33
4. Step 4: Simplify right side
   255.61x = 42,685.59
5. Step 5: Solve for x
   x = 42,685.59/255.61
6. Step 6: Final answer
   x = 166.99